<g:if test="${session.user}">
  欢迎您，${session.user}
  <g:link controller="blog" action="logout">退出</g:link>
  !
</g:if>
<g:each in="${nav}" status="i" var="n">
  <span class="menuButton"><a href="${n.link}">${n.title}</a></span>
</g:each>
